2431212840 has 256 divisors, whose sum is σ = 9807091200. Its totient is φ = 522989568.

The previous prime is 2431212821. The next prime is 2431212841. The reversal of 2431212840 is 482121342.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2431212841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119062 + ... + 137978.

It is an arithmetic number, because the mean of its divisors is an integer number (38308950).

Almost surely, 2^2431212840 is an apocalyptic number.

2431212840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2431212840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4903545600).

2431212840 is an abundant number, since it is smaller than the sum of its proper divisors (7375878360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2431212840 is a wasteful number, since it uses less digits than its factorization.

2431212840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18961 (or 18951 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 2431212840 is about 49307.3304894921. The cubic root of 2431212840 is about 1344.6450586553.

The spelling of 2431212840 in words is "two billion, four hundred thirty-one million, two hundred twelve thousand, eight hundred forty".